guisard
noun
gui·sard
Definition
1. a person who wears a mask; mummer
Examples
The man affects to be a fanatical guisard ; we four only know that he is on our side.
The Works of Honor de Balzac
Honor de Balzac
Some guisard doubtless told him of what had occurred between Amyot and the queen-mother.
Catherine de’ Medici
Honore de Balzac
I have quite a collection of knives—some guisard, and some Italian, but mostly of Toledo make.
The White Plumes of Navarre
Samuel Rutherford Crocket
Origin
obsolete Scots gyze to disguise, from Middle English gyzen to dress, from guise, gyze guise
A Writer's Life 